Harsh weather conditions and tight police border controls have stopped thousands of migrants from attempting to cross into Croatia at the European Union’s Balkan frontier, leaving them stuck in impoverished Bosnia until spring.

Three-year-old Emily is curled in the corner of a bunk bed, under anesthesia. Her Venezuelan mother watches over her, swaying as the hospital ship pitches back and forth off the coast of northern Colombia.

Thousands of Central American migrants are digging in for a long haul at a filthy, overcrowded sports complex in sight of the United States, while a small number have opted to return home after clashes with border forces dimmed hopes of crossing.

Some members of a large group of migrants who tried to rush the US border from Mexico, prompting the closure of a major border crossing in San Diego, will be deported to their home countries, according to Mexican authorities.

An attempt by 500 migrants to rush the southern border is likely to pour fresh fuel on Donald Trump’s inflammatory rhetoric on immigration as he tries to bolster his presidency at a perilous political moment.

Migrants from Central America are turning to former colonial master Spain as they face rejection from the United States in their attempts to escape rampant violence and poverty at home, but the streets of Madrid offer little relief.

Unaccompanied minors and other vulnerable migrants risk falling victim to crime in the Mexican border city of Tijuana, where thousands of Central Americans from caravans may be stuck for months as authorities tighten up asylum rules, advocates say.

Ecuador needs some $550 million to provide aid to Venezuelan citizens fleeing their country’s economic crisis, and hopes to raise the funds through donations from multilateral agencies and nearby countries, an Ecuadorean official said the Friday.